In the dense central regions of globular clusters close encounters of two white dwarfs
are relatively frequent. The estimated frequency is one or more strong encounters per star in the
lifetime of the cluster. Such encounters should be then potential sources of gravitational wave
radiation. Thus, it is foreseeable that these collisions could be either individually detected by
LISA or they could contribute significantly to the background noise of the detector. We compute
the pattern of gravitational wave emission from these encounters for a sufficiently broad range
of system parameters, namely the masses, the relative velocities and the distances of the two
white dwarfs involved in the encounter.